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Fire Buckets : All labs should be equipped with a fire bucket. The buckets are not used only for carrying water to a fire. This is one of their uses. The other way a fire bucket is used is by keeping it filled with sand and a scoop. You will find that sand can extinguish fire quickly and effectively. It is particularly useful for dealing with liquid spillage or with reactive chemicals such as alkali metals. Other advantages of sand are that it is easy to use and it is easy to clear up. If you use sand as an extinguisher or absorber, use it liberally. Speed is important when controlling fire or dangerous spillage, but you must be careful not to throw a large quantity of sand onto the hazard in your haste. This could cause splashing which would make the hazard worse. Of course, sprinkling too little sand onto the hazard is equally useless. Quick, liberal pouring is the best method and you should aim to cover the whole area of the flames or spillage, working from the outer edge inwards. Sand buckets should be three-quarters full, and covered with a loose cardboard disc with a hole in the centre. This sand should not be used for sand baths.
Define the Mechanism of Hormone Action Hormones affect cell function either by activating cyclic AMP (Adenosine monophosphate) mechanism or by activating genes. You may recall
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Flammable Liquids : Bulk supplies of all flammable liquids should be kept in a solvent store well away from main buildings. The store should be securely locked and fire warning no
Objectives : After studying this unit, you should be able to 1. explain the need for safety and health regulations using an example, 2. describe the use of National Buildi
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